package com.itheima.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.common.CustomException;
import com.itheima.dao.CategoryMapper;
import com.itheima.pojo.Category;
import com.itheima.pojo.Dish;
import com.itheima.pojo.Setmeal;
import com.itheima.service.CategoryService;
import com.itheima.service.DishService;
import com.itheima.service.SetmealService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Slf4j
@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {
    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;


    /*
     * 根据id删除分类，删除前进行判断*/
    @Override
    public void remove(Long id) {
        //查询菜单数据
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();
        dishLambdaQueryWrapper.eq(Dish::getCategoryId, id);
        int dishcount = dishService.count(dishLambdaQueryWrapper);
        //如果已经关联，抛出一个业务异常
        if (dishcount > 0) {
            throw new CustomException("当前分类下关联了菜品，不能删除");
        }
        //查询当前分类是否关联了套餐，抛出业务异常
        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper = new LambdaQueryWrapper<>();
        setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId, id);
        int setmealcount = setmealService.count(setmealLambdaQueryWrapper);
        //如果已经关联，抛出一个业务异常
        if (setmealcount > 0) {
            throw new CustomException("当前分类下关联了套餐，不能删除");
        }
        super.removeById(id);

    }
}
